Show destination offline status in the print preview.

chrome/browser/resources/print_preview/data/destination.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('print_preview', function() {
   'use strict';
 
   /**
    * Print destination data object that holds data for both local and cloud
    * destinations.
@@ skipping 234 matching lines @@
     get isPrivet() {
       return this.origin_ == Destination.Origin.PRIVET;
     },
 
     /**
      * @return {string} The location of the destination, or an empty string if
      *     the location is unknown.
      */
     get location() {
       if (this.location_ == null) {
+        this.location_ = '';
         for (var tag, i = 0; tag = this.tags_[i]; i++) {
           if (tag.indexOf(Destination.LOCATION_TAG_PREFIX) == 0) {
             this.location_ = tag.substring(
                 Destination.LOCATION_TAG_PREFIX.length) || '';
             break;
           }
         }
       }
       return this.location_;
     },
@@ skipping 30 matching lines @@
     },
 
     /**
      * @param {!print_preview.Destination.ConnectionStatus} status Connection
      *     status of the print destination.
      */
     set connectionStatus(status) {
       this.connectionStatus_ = status;
     },
 
+    /** @return {boolean} Whether the destination is considered offline. */
+    get isOffline() {
+      return arrayContains([print_preview.Destination.ConnectionStatus.OFFLINE,
+                            print_preview.Destination.ConnectionStatus.DORMANT],
+                            this.connectionStatus_);
+    },
+
+    /** @return {string} Human readable status for offline destination. */
+    get offlineStatusText() {
+      if (!this.isOffline) {
+        return '';
+      }
+      var offlineDurationMs = Date.now() - this.lastAccessTime_;
+      var offlineMessageId;
+      if (offlineDurationMs > 31622400000.0) {  // One year.
+        offlineMessageId = 'offlineForYear';
+      } else if (offlineDurationMs > 2678400000.0) {  // One month.
+        offlineMessageId = 'offlineForMonth';
+      } else if (offlineDurationMs > 604800000.0) {  // One week.
+        offlineMessageId = 'offlineForWeek';
+      } else {
+        offlineMessageId = 'offline';
+      }
+      return localStrings.getString(offlineMessageId);
+    },
+
     /**
      * @return {number} Number of milliseconds since the epoch when the printer
      *     was last accessed.
      */
     get lastAccessTime() {
       return this.lastAccessTime_;
     },
 
     /** @return {string} Relative URL of the destination's icon. */
     get iconUrl() {
@@ skipping 72 matching lines @@
    * }}
    */
   var Cdd = Object;
 
   // Export
   return {
     Destination: Destination,
     Cdd: Cdd
   };
 });